Home / 21,222.92-29,290.21-12,151.65

Finding the Fourth Proportional to 21,222.92, 29,290.21 and 12,151.65

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Solution

The fourth proportional to 21,222.92, 29,290.21 and 12,151.65 is: 16,770.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.92 : 29,290.21 = 12,151.65 : x
  2. Step 2: Convert to fraction form
    21,222.92/29,290.21 = 12,151.65/x
  3. Step 3: Cross multiply
    21,222.92x = 29,290.21 × 12,151.65
  4. Step 4: Simplify right side
    21,222.92x = 355,924,380.35
  5. Step 5: Solve for x
    x = 355,924,380.35/21,222.92
  6. Step 6: Final answer
    x = 16,770.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.